Morphology control of copper indium disulfide nanocrystals

摘要

In this report, we present a hot-injection strategy for the synthesis of CuInS_2 (CIS) nanocrystals with hexagonal, pyramidal and nanorod shapes. For that purpose copper (1) and indium (III) acetates were dissolved in oleylamine as a high-boiling solvent. 7ert-dodecanethiol (t-DDT) was used as a sulfur source. It was mixed with l-dodecanothiol (l-DDT) and injected at a high temperature. The presence of the second dodecanethiol was necessary to control the growth of the synthesized nanocrystals. We observed a strong influence of the t-DDT amount on the morphology of the CIS nanocrystals. By the variation of the injected solution uniform CIS nanorods with different aspect ratio and size were obtained.